Doubtly
@Doubtly · Joined Feb 2021
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- Why is the IDL considered with respect to the 1800 meridian only? Our 24-hour day starts at 12 midnight. Because of the earth’s rotation, the midnight occurs at different times, at different places. As the... 1
- Why doesn’t the IDL pass through land? If the IDL had passed through a land or some islands, the people there would have had to follow different dates and timings because dates wo... 1
- Why is the IDL not a straight line like the 1800 meridian? Attempt has been made to make the IDL pass through the Pacific Ocean completely. Had it passed through a land or some islands, the people th... 1
- While crossing the IDL, what changes will you make? When you cross the 180° meridian, some precautions need to be taken. There is a difference of 12 hours from Prime Meridian, if you go from E... 1
- What considerations have been made while deciding the IDL? The following points were taken into consideration while drawing the International Date Line. (IDL): 1. The direction of travel 2. The curre... 2
- The day starts in the Pacific Ocean on the earth The IDL passes through the Pacific Ocean. With reference to the IDL, the day on Earth starts in the West and ends in the East. It is one and... 1
- IDL is proving to be very useful in today’s times IDL is proving to be very useful in today’s times because: The IDL brings coordination between international airlines, transportation servic... 1
- Give a brief account of the discovery of the cell. Cells are the basic structural and functional unit of life. The term cells was first coined in 1665 by a British scientist Robert Hooke. He... 2
- Mention differences between light microscope and electron microscope. Light microscope Electron microscope Uses light as an illuminating source Uses electrons beam as an illuminating source Both live and dead s... 1
- Write down the differences between the nucleus and nucleoid. Nucleus Nucleoid A nucleus is a membrane-bound structure in which eukaryotes store their genetic materials. Nucleoid is a particular area in... 1
- Write down the differences between organ and organelle. Organ Organelle These are the parts of a body These are the parts of a cell These are found in multicellular organisms These are found in un... 2
- Distinguish between prokaryotic and eukaryotic cells. Prokaryotic Eukaryotic Organisms are always unicellular Organisms are always unicellular and multicellular Nucleus is absent Nucleus is pres... 1
- Why is irrigation essential? Irrigation helps to cultivate superior crops with the water supply as per the need of the crops. Ultimately it helps in economic development... 1
- Explain why a legume crop does not require nitrogenous fertilizers? The nitrogen-fixing bacteria reside in the root nodules of the leguminous plants. They convert atmospheric nitrogen into soluble nitrogenous... 1
- Give a short account of biofertilizers. Biofertilizers are the substance that contains microbes, which helps in promoting the growth of plants, trees by increasing the supply of es... 1
- What are fertilizers? Classify fertilizers. Fertilizers are chemical substances supplied to the crops to increase their productivity. The fertilizers contain the essential nutrients re... 2
- What is green manuring? Give suitable example for green manures. The process in which growing, ploughing and mixing of green crops along=g with soil to improve the physical and chemical structure of the so... 1
- Define manure. What are different manures and how do they affect the soil? Manure is an organic matter derived from the solid animal wastes, used to improve the soil quality and increase the yield of healthy crops.... 2